void MediaPluginCEF::onLoadStartCallback()
{
	LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA_BROWSER, "navigate_begin");
	//message.setValue("uri", event.getEventUri());  // not easily available here in CEF - needed?
	message.setValueBoolean("history_back_available", mLLCEFLib->canGoBack());
	message.setValueBoolean("history_forward_available", mLLCEFLib->canGoForward());
	sendMessage(message);
}
void MediaPluginCEF::onLoadEndCallback(int httpStatusCode)
{
	LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA_BROWSER, "navigate_complete");
	//message.setValue("uri", event.getEventUri());  // not easily available here in CEF - needed?
	message.setValueS32("result_code", httpStatusCode);
	message.setValueBoolean("history_back_available", mLLCEFLib->canGoBack());
	message.setValueBoolean("history_forward_available", mLLCEFLib->canGoForward());
	sendMessage(message);
}